Seismic-resistance Analysis Of Girder Aqueduct Concrete Structure With Multi-side Walls

With the need for sustainable development of the national economy, solve the uneven distribution of water resources in China, became increasingly urgent. To this end, China’s large-scale water diversion project started construction since2004, the project is divided into three parts of eastern, central and western lines, across the great Northwest China and North China, project the amount of the broad geographical terrain complex unprecedented, especially works mostly in the high intensity high incidence of the earthquake zone, so the seismic performance of engineering structures is particularly important.A lot of study the aqueduct structural vibration isolation, seismic and other literature on the basis of open type aqueduct object of study, a large aqueduct (including Aqueduct+slot pier), the application housner theory, the establishment of the mechanics of fluid-structure interactionmodel of periodic seismic waves applied to the aqueduct structure of X, Y-, Z-direction using ANSYS analysis software and structural dynamic analysis time history analysis method and modal superposition method, on the vibration characteristics of analysis and earthquake response analysis of aqueduct structurecalculate the four conditions (empty slot in the slot over the water, both sides of the trough over the water, all over the water), the various components of the aqueduct structure (aqueduct, tank pier, side walls, backplane) displacement and stress response. Analysis ANSYS calculation data, the following analysis results:Finally won the structure natural frequencies and the displacement and stress data of the aqueduct floor, side wall slot pier and Aqueduct in the four conditions, and analysing the structural characteristics on the basis of the data. The results showed that:the most unfavorable operating conditions was the three slot through the water, the cross-slot earthquake is more unfavorable tothe structure compared to the vertical direction earthquake.Slot body and the side wall of the aqueduct structure is most weak parts in the two directions of the earthquake effect, should pay attention to the security and stability of the slot pier structure in seismic action of the Vertical tank body under direction.(1) open aqueduct structure, the groove of the body side wall horizontal seismic capacity is relatively low, the safety factor under various conditions;(2) Under the action of the fluid-structure interaction, the different structural parts of the aqueduct, the most adverse working conditions. designed to deal with such weak parts strengthened in order to improve the seismic safety of the aqueduct.(3) Horizontal earthquake (horizontal slot or crossheading), the maximum displacement of the structure occurred in the operating conditions (all over the water), its most unfavorable position Aqueduct Aqueduct horizontal trough seismic displacement is much larger than thealong the groove direction;(4) Earthquake along the slot and cross slot to Aqueduct structural stress than other structures;(5) Smooth groove to the seismic action on the slot pier security;(6) Horizontal seismic excitation caused by the the aqueduct earthquake response is greater than the vertical excitation caused by the earthquake response. The results show that the law of this article results of seismic analysis of the general consensus is very consistent.